Question

Помогииииите пожалуууйста Автомобиль проехал пераую половину пути со скоростью 36км/ч ,а вторую со скоростью 15 м/с. Найти среднюю скорость автомобиля.

Answer 1

T1=0,5*S/V1
t2=0,5*S/V2
t=t1+t2=V1*V2/(0,5*S*(V1+V2))
Vср=S/t=V1*V2/(0,5*(V1+V2))=10*15/(0,5*(10+15))=12 м/с

Answer 2

Calculation of Average Speed

To find the average speed of the car, we need to calculate the total distance traveled and the total time taken.

Let's assume that the total distance traveled is D and the total time taken is T.

The car traveled the first half of the distance at a speed of 36 km/h and the second half at a speed of 15 m/s.

To calculate the total distance, we need to find the distance traveled in the first half and the distance traveled in the second half.

Let's assume the total distance is divided into two equal halves, so each half is D/2.

The distance traveled in the first half is D/2 and the distance traveled in the second half is also D/2.

The time taken to travel the first half can be calculated using the formula:

Time taken = Distance / Speed

For the first half: Time taken = (D/2) / 36 km/h

The time taken to travel the second half can be calculated using the formula:

Time taken = Distance / Speed

For the second half: Time taken = (D/2) / 15 m/s

To find the total time taken, we need to add the time taken for the first half and the time taken for the second half:

Total time taken = (D/2) / 36 km/h + (D/2) / 15 m/s

Now, we can calculate the average speed using the formula:

Average Speed = Total Distance / Total Time Taken

Let's calculate the average speed step by step.

Calculation Steps:

1. Calculate the time taken for the first half: - Time taken for the first half = (D/2) / 36 km/h

2. Calculate the time taken for the second half: - Time taken for the second half = (D/2) / 15 m/s

3. Calculate the total time taken: - Total time taken = Time taken for the first half + Time taken for the second half

4. Calculate the average speed: - Average Speed = Total Distance / Total Time Taken

Now, let's calculate the average speed using the given information.

Calculation:

1. Calculate the time taken for the first half: - Time taken for the first half = (D/2) / 36 km/h

2. Calculate the time taken for the second half: - Time taken for the second half = (D/2) / 15 m/s

3. Calculate the total time taken: - Total time taken = Time taken for the first half + Time taken for the second half

4. Calculate the average speed: - Average Speed = Total Distance / Total Time Taken

Unfortunately, the given information does not provide the total distance traveled. Without the total distance, we cannot calculate the average speed. Could you please provide the total distance traveled?